Bump the version number to 2.0.0 in package.json and package-lock.json (#228)

* `package.json`: Bump the version number to 2.0.0

* `package-lock.json`: set the version number to `2.0.0`

* run `npm build`

---------

Co-authored-by: Ian Butterworth <[email protected]>

Author: DilumAluthge

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "setup-julia",
-  "version": "1.9.6",
+  "version": "2.0.0",
   "private": true,
   "description": "setup Julia action",
   "main": "lib/setup-julia.js",